I opened
pa`ar (paw-ar')
to yawn, i.e. open wide -- gape, open (wide).
my mouth
peh (peh)
the mouth (as the means of blowing), whether literal or figurative (particularly speech); specifically edge, portion or side; adverbially (with preposition) according to
and panted
sha'aph (shaw-af')
to inhale eagerly; figuratively, to cover; by implication, to be angry; also to hasten -- desire (earnestly), devour, haste, pant, snuff up, swallow up.
for I longed
ya'ab (yaw-ab')
to desire -- long.
for thy commandments
mitsvah (mits-vaw')
a command, whether human or divine (collectively, the Law) -- (which was) commanded(-ment), law, ordinance, precept.